Protecting-screen for furnaces.



F. GORIN. PROTECTING SCREEN FOR FURNACES. 4

APPLICATION I'I'LED DEO.12, 1912. I

Patented Feb. 17, 1914.

n'ven 01'': W M er Witnesses:

v a m Attorney.

Ce fgew coLuMBIA PLANOOIIAIH COHWASHINGTON- D. C-.

earns PATENT anion.

PROTECTING-SCREEN FOR FURNACES.

Specification of Letters Patent.

Application filed December 12, 1912.

Serial No. 736,359.

To all whom it may concern:

Be it known that I, FRANgoIs OoRIN, a citizen of Belgium, residing atSclaigneaux, in the Kingdom of Belgium, have invented a certain new anduseful Improvement in Protecting-Screens for Furnaces, of which thefollowing is a specification.

The present invention has for its object a device for affordingprotection, from radiation, emanation, gases, smoke and dust, to theworkman attending to metallurgical furnaces.

This device is specially devised for zinc furnaces built with a numberof tiers of retorts or for any furnace of which certain parts mustperiodically be rendered accessible.

It comprises broadly a series of shutters pivoted around horizontal axesand resting one upon the other in such a manner that a space not coveredby the said shutters is left between the shutters that are turned downand those that are raised.

An embodiment of the invention is illustrated by way of example in theaccompanying drawing, in which Figure 1 is a front elevation of thescreen or curtain fitted in front of a zinc furnace. Fig. 2 is avertical section on the line A--B in Fig. 1 Fig. 3 is a vertical sectionon the line A-B in Fig. 1 with the parts in a different position. Fig.at is a vertical section through A-B of Fig. 1 showing theupper shutter,illustrated in Figs. 1 and 2 omitted. Fig. 5 is an enlarged view of theend portion of one of the shutters. Fig. 6 is a sec tion on the line CDof Fig. 5.

A frame 1, suspended by cables 2 and 3 and carrying a counterweight 4;is arranged in front of the furnace 5. Upon the vertical sides of theseframes 1 shutters 6 are pivoted horizontally. These shutters extendvertically to the same height as the height of the tier of retorts 7 andare preferably of the same width as the retorts. When all the shuttersare turned down, as represented in Fig. 3, the side 8 of each rests uponthe pivoted side 9 of next lower shutter, all except the last whichrests upon a stop 10. In this position of the parts the front of thevenient means.

furnace is completely hidden by the screen.

If the upper shutter 6 be raised in such a manner as to bring it againstthe upper stop or bearing 11 constituted by the draft chimney 12, theupper tier of retorts 7 is exposed as particularly represented in Figs.1 and 2. Bybringing the shutter 6 against the shutter 6 the second tierof retorts is exposed and so on in succession. The shutters 6 thusraised are held in this position by small catches or tappets 22 arrangedat the sides of the frame or by any other con- The dust, smoke,emanations and so forth liberated from the retorts 7 and from the ashpit, are drawn up the chimney 12. This screen can, if necessary becooled by a water shower delivered thereagainst by a horizontal,perforated pipe 19 which is located at the upper part of the screen,preferably in the position shown in Fig. 1. This pipe is connected at 20with a flexible tube 21 which allows of manipulation of the screen.

The entire system can be raised by means of cables and the furnacecompletely exposed for any work which necessitates the removal of thescreen.

The shutters 6 may advantageously present the form illustrated in Figs.1 and 5 in accordance with which each shutter is c011- stituted by twopieces of sheet metal 14. and 15 riveted together at 8 and also rivetedto a channel shaped cross piece 16 to which the pivots 17 are fixed.Holes 18 are formed in the plates 14 and 15. These holes are instaggered relation as shown in Fig. 5, so as to permit of a circulationof air for cooling the plates without directly exposing any part of thefurnace. It may be remarked that the top shutter can be dispensed with,as shown in Fig. 4.

hat I claim and desire to secure by Letters Patent of the United Statesis 1. A protecting screen or curtain for metallurgical furnacescomprising a plurality of shutters pivoted about horizontal axesparallel with the face of the furnace, said shutters normally restingone upon the other and each of them being adapted to be rotated throughan angle of 180.

Patented Feb.17,1914:.

2. A protecting screen or curtain for met- In testimony whereof I aflixmy signature allurgical furnaces comprising a plurality in presence oftwo Witnesses. of shutters )ivoted about horizontal axes a T 1, parallelWith the face of the furnace, said BRA} QOIS COhIN 5 shutters normallyresting one upon the Witnesses:

other and being perforated so as to permit LEONARD LEVER, of acirculation of air Within said shutters. GEORGES VANDER HAUerinN.

Copies of this patent may be obtained for five cents each, byaddressingthe Commissioner of Patents. Washington, D. C.

